Zebra Card HE-003: tumors and congenital cyanosis

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	Suspected tumor in a patient with congenital cyanosis
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	pheochromocytoma, carotid body tumor (chemodectoma)
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	Summarizes an epidemiologic study of congenital heart disease in the Qinghai plateau (in China and/or Tibet). Of 13446 children examined, 118 (0.88%) had congenital heart disease. Of those 118, there were 8 born at sea level, 29 at 2261m above sea level, 40 at 2500-3050m, and 41 at 3200-5157m. There are not enough details presented, however, to eliminate the numerous potential confounding factors in the relationship between altitude and congenital heart disease. [101]

	(1)	Cyanotic malformations of the heart with pheochromocytoma. Folger GM, et al. Circulation. 1964;29:750-757.
	(2)	Congenital heart disease and pheochromocytoma. Reynolds JL, Gilchrist TF. Am J Dis Child 1966 Sep;112(3):251-5. Pubmed Similars
	(3)	Cyanotic heart disease: "low altitude" risk for carotid body tumor?. Nissenblatt MJ. Johns Hopkins Med J 1978 Jan;142(1):18-22. Pubmed+Abstract Similars
	(4)	Ectopic production of hormones and other proteins by tumors. Baylin SB. Hopsital Practice. 1975;10(10):117-126.

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